Carotenóides como alternativa contra a hipovitaminose A
Palavras-chave:
carotenóides, disponibilidade biológica, hipovitaminose AResumo
A hipovitaminose A acarreta xeroftalmia, cegueira e morte em milhares de crianças no mundo e constitui um dos principais problemas nutricionais de populações de países em desenvolvimento, incluído o Brasil. Embora haja grande disponibilidade de frutas e verduras, fontes de carotenóides no Brasil, a hipovitaminose A constitui um grave problema de saúde pública. A falta de informação da população, no que diz respeito às fontes alimentares e aos fatores que interferem na biodisponibilidade dos carotenóides, citados na literatura, com a “mnemônica” SLAMENGHI são possíveis causas associadas a esta contradição. Os atuais fatores de conversão de carotenóides em retinol são superiores aos antigos fatores, o que pressupõe uma efetividade ainda menor na conversão dos carotenóides na forma ativa da vitamina A e coloca em questão a utilização destes no combate à hipovitaminose A. Esta revisão tem como objetivo relatar o que vem sendo abordado acerca do tema biodisponibilidade e fontes de carotenóides, para possibilitar um melhor posicionamento na utilização dos carotenóides no combate à hipovitaminose A.
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